This document provides an overview of various computer input devices. It begins by defining input and describing common input devices like keyboards, mice, and pointing devices. It then explains different types of keyboards, mice, and other pointing devices. The document discusses voice input, input devices for mobile devices, digital cameras, video input, scanners, reading devices, terminals, biometric devices, and input devices recommended for home users. Overall, the document surveys a wide range of computer input technologies and how they function.

1. Chapter 5
Input

2. Chapter 5 Objectives
Define inputDefine input
List the characteristics of a keyboardList the characteristics of a keyboard
Describe different mouse types
and how they work
Describe different mouse types
and how they work
Summarize how various pointing
devices work
Summarize how various pointing
devices work
Explain how voice recognition worksExplain how voice recognition works
Describe various input devices
for PDAs, smart phones, and Tablet PCs
Describe various input devices
for PDAs, smart phones, and Tablet PCs
Explain how a digital camera worksExplain how a digital camera works
Describe uses of PC video cameras,
Web cams, and video conferencing
Describe uses of PC video cameras,
Web cams, and video conferencing
Discuss various scanners and reading
devices and how they work
Discuss various scanners and reading
devices and how they work
Explain the types of terminalsExplain the types of terminals
Summarize the various biometric
devices
Summarize the various biometric
devices
Identify alternative input devices for
physically challenged users
Identify alternative input devices for
physically challenged users
Next

3. What Is Input?
What is input?
p. 234 and 236 Fig. 5-1 Next
 Input device is any hardware component that
allows users to enter data and instructions
 Data or instructions entered into memory of
computer

4. What Is Input?
What are the two types of input?
p. 234 Next
 Unprocessed text,
numbers, images,
audio, and video
 Instructions
 Programs
 Commands
 User responses
 Data

5. The Keyboard
How is the keyboard divided?
p. 236 Fig. 5-2 Next
 Typing area
 Numeric keypad
 Function keys, special
keys that issue
commands

6. The Keyboard
What are alternative forms for commands?
p. 236 Next
MICROSOFT WORD KEY COMBINATION EQUIVALENTS
Key Menu |
Command Combination Command Button
Copy Shift+F2 or Edit | Copy
Ctrl+C
Open Ctrl+F12 File | Open
Paste Ctrl+V Edit | Paste
 Many programs allow you to use key combination,
menu, or button to obtain same result

7. The Keyboard
What is the insertion point?
p. 237 Fig. 5-3 Next
 Blinking vertical bar that indicates where next
character you type will display
 Pointer changes
location and shape
as you move mouse
or other pointing
device

8. The Keyboard
What is a cordless keyboard?
p. 238 Fig. 5-4 Next
 Communicate with a
receiver attached to a
port on the system
unit

9. The Keyboard
What are other types of keyboards?
p. 238 Next
 Notebook and many
handheld computers
have built-in keyboards

10. Pointing Devices
What is a mouse?
p. 239 Fig. 5-5 Next
 Pointing device that fits under palm of hand
 Pointing device controls
movement of pointer, also
called mouse pointer
 Mechanical mouse
has rubber or metal
ball on underside
mouse buttons
wheel
button
mouse pad
ball
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Mouse
below Chapter 5

11. Pointing Devices
What is an optical mouse?
p. 239 Fig. 5-6 Next
 No moving mechanical
parts inside
 Senses light to detect
mouse’s movement
 More precise than
mechanical mouse
 Connects using a
cable, or wireless

12. Pointing Devices
How do you use a mouse?
p. 240 Next
Step 1. Place the mouse toward the right
of the mouse pad.
Step 2. Move the mouse diagonally toward
the left until the pointer is positioned on the
Microsoft Outlook icon.
 As you move mouse, pointer
on screen moves

13. Tilt
wheel
Tilt
wheel
Press
wheel
button
Press
wheel
button
Right-
drag
Right-
drag
Right-
click
Right-
click
Triple-
click
Triple-
click
Double-
click
Double-
click
Pointing Devices
What are common mouse operations?
p. 237 Next
PointPoint
ClickClick
DragDrag
Rotate
wheel
Rotate
wheel

14. Video: Alternatives to Your Boring
Mouse
Beyond the mouse; cool alternatives to mousing around
low quality
(click to start)
high quality
(click to start)
Next

15. Other Pointing Devices
What is a trackball?
p. 241 Fig. 5-8 Next
 Stationary pointing device
with a ball on its top or side
 To move pointer, rotate ball
with thumb, fingers, or palm
of hand

16. Other Pointing Devices
What are a touchpad and a
pointing stick?
p. 241 - 242 Figs. 5-9—5-10 Next
 Touchpad is small, flat,
rectangular pointing device
sensitive to pressure and motion
 Pointing stick is pointing device
shaped like pencil eraser
positioned between keys on
keyboard
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Touchpad or Pointing
Stick below Chapter 5

17. Other Pointing Devices
What are a joystick and a wheel?
p. 242 Fig. 5-11 Next
 Joystick is vertical
lever mounted
on a base
 Wheel is
steering-wheel-type
input device
 Pedal simulates
car brakes and
accelerator

18. Other Pointing Devices
What is a light pen?
p. 242 Fig. 5-12 Next
 Handheld input device
that can detect light
 Press light pen against
screen surface and then
press button on pen

19. Other Pointing Devices
What is a touch screen?
p. 243 Fig. 5-13 Next
 Touch areas of screen with
finger
 Often used with kiosks
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Touch Screen
below Chapter 5

20. Keyboard and Pointing Devices
What is a stylus and a digital pen?
p. 243 Fig. 5-14 and 5-15 Next
 Looks like a ballpoint pen, but uses pressure to write
text and draw lines
 Used with graphics tablets, flat electronic boards
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Pen Input
below Chapter 5

21. Voice Input
How does voice recognition work?
p. 246 Next
Step 2. An analog-to-digital converter (ADC) translates
sound waves into digital measurements computer can
process. Measurements include pitch, volume, silences, and
phonemes. Phonemes are sound units such as aw and guh.
10010111010110101100001101
Step 3. Software compares
spoken measurements with those
in its database to find a match or
list of possible matches.
Matches
Step 4. To narrow a list down, software presents user
with a list of choices or uses a natural language
component to predict most likely match. User may correct
any selection made by software.
Natural Language Engine
Step 1. A user dictates text into a microphone.
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Voice Input
below Chapter 5

22. Voice Input
What is a MIDI (musical instrument
digital interface)?
p. 246 Fig. 5-19 Next
 External device, such as electronic piano
keyboard, to input music and sound
effects

23. PDAs, Tablet PCs, and Smart
Phones
How is a data
entered into a
PDA?
p. 247 Fig. 5-20 Next

24. PDAs, Tablet PCs, and Smart
Phones
What is a portable keyboard
and a docking station?
p. 248 Fig. 5-21 Next
 A portable keyboard is
a full-sized keyboard
you conveniently attach
to and remove from
PDA
 A docking station is an
external device that
holds a mobile
computer

25. PDAs, Tablet PCs, and Smart
Phones
What is a smart phone?
p. 248 Fig. 5-22 Next
 Users can input and send
text messages, graphics,
pictures, video clips, and
sound files
 Many have a built-in or
attachable camera

26. PDAs, Tablet PCs, and Smart
Phones
What is a Tablet PC?
p. 249 Fig. 5-23 Next
 Mobile computer that
includes handwriting
recognition software
 Primary input device is a
pressure-sensitive digital
pen

27. Digital Cameras
What is a digital camera?
p. 250 Fig. 5-24 Next
 Allows you to take
digital pictures
 Images viewable
immediately on
camera
 Download to
computer
 Post pictures
to Web

28. Digital Cameras
How does a digital camera work?
p. 251 Fig. 5-25 Next
Step 1. Point to the image to
photograph and take picture.
Light passes into the lens of the
camera.
Step 2. Image is focused on a
chip called a charge-coupled
device (CCD).
Step 3. CCD generates an analog
signal that represents the image.
Step 4. Analog signal is converted
to digital signal by analog-to-
digital converter (ADC).
Step 5. Digital signal processor
(DSP) adjusts quality of image and
usually stores digital image on
miniature mobile storage media in
the camera.
Step 6. Images are transferred to a
computer’s hard disk by plugging one
end of the cable into a camera and the
other end into a computer; or images
are copied to hard disk from storage
media used in the camera.
Step 7. Using software
supplied with the
camera, images are
viewed on screen,
incorporated into
documents, edited, and
printed.

29. Digital Cameras
What is resolution?
p. 252 Fig. 5-26 Next
 Sharpness and clarity of image
 The higher the resolution, the better the image
quality, but the more expensive the camera
 Pixel (picture element)
is single point in
electronic image
 Greater the number of
pixels, the better the
image quality

30. Video Input
What is video input?
p. 253 Fig. 5-27 Next
 Process of entering full-motion images
into computer
 Video capture card is
adapter card that converts
analog video signal into
digital signal that
computer can use
 Digital video (DV)
camera records video as
digital signals

31. Video Input
What are a PC video camera and a Web cam?
p. 253 Fig. 5-28 Next
 PC video camerac—cDV camera used to capture video
and still images, and to make
video telephone calls on Internet
 Also called PC camera
 Web camc—cvideo camera
whose output displays on
a Web page
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click PC Video Cameras
below Chapter 5

32. Video Input
What is video conferencing?
p. 254 Fig. 5-29 Next
 Whiteboard is
another window on
screen that can
display notes and
drawings
simultaneously on
all participants’
screens
 Two or more geographically separated people
who use network or Internet to transmit
audio and video data

33. Scanners and Reading Devices
What is a scanner?
p. 255 Fig. 5-30 Next
 Light-sensing device that
reads printed text and
graphics
 Used for image processing,
converting paper documents
into electronic images
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Scanners
below Chapter 5
Drum
Flatbed
Pen or
Handheld
Sheet-fed

34. Scanners and Reading Devices
How does a flatbed
scanner work?
p. 256 Fig. 5-31 Next
Step 2. Bright light moves underneath
scanned document.
Step 3. Image of the document is
reflected into a series of mirrors.
Step 1. Document to be scanned is
placed face down on the glass window.
Step 6. Users can print image,
e-mail it, include it in a document,
or place it on a Web page.
Step 4. Light is
converted to analog
electrical current that
is converted to
digital signal by an
analog-to-digital
converter (ADC).
Step 5. Digital information is sent to
memory in the computer to be used by
illustration, desktop publishing, or
other software; or it is stored on disk.

35. Scanners and Reading Devices
What is an optical reader?
p. 257 Fig. 5-32 Next
 Optical character recognition
(OCR) reads characters in
OCR font
 Optical mark recognition
(OMR) reads hand-drawn pencil
marks, such as small circles
 Device that uses light source to read characters, marks,
and codes and then converts them into digital data

36. Scanners and Reading Devices
What is a turnaround document?
p. 257 Fig. 5-33 Next
 Document that you
return to the company
that sent it
 Portion you return has
information printed in
OCR characters

37. Scanners and Reading Devices
What is a bar code reader?
p. 258 Fig. 5-34 Next
 Uses laser beams to read bar codes

38. Scanners and Reading Devices
What is a bar code?
p. 258 Fig. 5-35 Next
 Identification code that consists of a set of vertical
lines and spaces of different widths
 Universal Product
Code (UPC)

39. Other Input Devices
What is an RFID reader?
p. 259 Fig. 5-36 Next
 Reads information on
the tag via radio waves
 Can be handheld
devices or mounted in a
stationary object

40. Other Input Devices
What is a magnetic stripe card reader?
p. 260 Fig. 5-37 Next
 Reads the magnetic
stripe on the back of a
credit card
 Exposure to a magnetic
field can erase the
contents of a card’s
magnetic stripe

41. What is a magnetic-ink character recognition
(MICR) reader?
Scanners and Reading Devices
p. 260 Fig. 5-38 Next
 Can read text printed with magnetized ink
 Banking industry almost exclusively uses MICR
for check processing

42. Scanners and Reading Devices
What is a data collection device?
p. 261 Fig. 5-39 Next
 Obtains data directly at location where transaction
or event takes place
 Transmits data over
network
or Internet

43. Terminals
What is a point of sale (POS) terminal?
p. 261 Fig. 5-40 Next
 Records purchases,
processes credit or
debit cards, and
updates inventory
 Swipe credit or debit
card through card
reader
 Reads customer’s
personal data from
magnetic strip

44. Terminals
What is an automated teller machine (ATM)?
p. 262 Fig. 5-41 Next
 Self-service banking
machine that connects to a
host computer through a
network

45. Biometric Input
What is biometrics?
p. 262 Fig. 5-42 and 5-43 Next
 Authenticates person’s identity
by verifying personal
characteristic
 Fingerprint scanner captures
curves and indentations of
fingerprint
 Hand geometry system measures
shape and size of person’s hand
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Biometric Input
below Chapter 5

46. Biometric Input
What are examples of biometric technology?
p. 263 Figs. 5-44—5-45 Next
 Voice verification system compares live
speech with stored voice pattern
 Signature verification system recognizes
shape of signature
 Iris recognition system reads
patterns in blood vessels in back
of eye
 Biometric data is sometimes stored
on smart card, which stores
personal data on microprocessor
embedded in card

47.  Enhanced keyboard or ergonomic keyboard
 Mouse
 Stylus for PDA or smart phone
 Joystick or wheel
 30-bit 600 × 1200 ppi color scanner
 2-megapixel digital camera
 Headset that includes a microphone
 PC video camera
Putting It All Together
What are recommended input devices for home users?
p. 265 Fig. 5-46 Next
Home

48.  Enhanced keyboard or ergonomic keyboard
 Mouse
 Stylus and portable keyboard for PDA or smart phone,
or digital pen for Tablet PC
 36-bit 600 × 1200 ppi color scanner
 2-megapixel digital camera
 Headset that includes a microphone
 PC video camera
Putting It All Together
p. 265 Fig. 5-46 Next
Small Office/
Home Office (SOHO)
What are recommended input devices for
small office/home office users (SOHO)?

49.  Wireless mouse for notebook computer
 Trackball, touchpad, or pointing stick on notebook computer
 Stylus and portable keyboard for PDA or smart phone, or digital
pen for Tablet PC
 2- or 3-megapixel digital camera
 Headset that includes a microphone
 Fingerprint scanner for notebook computer
Putting It All Together
What are recommended input devices for mobile users?
p. 265 Fig. 5-46 Next
Mobile

50.  Enhanced keyboard or ergonomic keyboard
 Mouse
 Stylus and portable keyboard for PDA or smart phone
 Pen for graphics tablet
 48-bit 1200 × 1200 ppi color scanner
 5- or 6-megapixel digital camera
 Headset that includes a microphone
 PC video camera
Putting It All Together
What are recommended input devices for power users?
p. 265 Fig. 5-46 Next
Power

51.  Enhanced keyboard or ergonomic keyboard
 Mouse
 Stylus and portable keyboard for PDA or smart phone, or digital
pen for Tablet PC
 Touch screen
 Light pen
 42-bit 1200 × 1200 ppi color scanner
 OCR/OMR readers, bar code readers, MICR reader, or data
collection devices
 Microphone
 Video camera for video conferences
 Fingerprint scanner or other biometric device
Putting It All Together
p. 265 Fig. 5-46 Next
Large Business
What are recommended input devices for large
business users?

52. Input Devices for Physically Challenged Users
What input devices are available
for those with physical limitations?
p. 266 Figs. 5-47 Next
 Keyguard allows users to rest
hands on keyboard without
accidentally pressing keys
 Head-mounted pointer
controls pointer on screen
 New developments include
gesture recognition and
computerized implant devices

53. Summary of Input
Keyboard, mouse, and other
pointing devices
Keyboard, mouse, and other
pointing devices
Voice inputVoice input
Input devices for PDAs, smart phones,
and Tablet PCs
Input devices for PDAs, smart phones,
and Tablet PCs
Digital camerasDigital cameras
Video InputVideo Input
Scanners and reading devicesScanners and reading devices
TerminalsTerminals
Biometric inputBiometric input
Input devices for physically
challenged users
Input devices for physically
challenged users
Chapter 5 Complete